ops(3pm) Perl Programmers Reference Guide ops(3pm)

# [NAME](#NAME)

ops - Perl pragma to restrict unsafe operations when compiling

# [SYNOPSIS](#SYNOPSIS)

```
  perl -Mops=:default ...    # only allow reasonably safe operations
  perl -M-ops=system ...     # disable the 'system' opcode
```

# [DESCRIPTION](#DESCRIPTION)

Since the "ops" pragma currently has an irreversible global effect, it is only of significant practical use with the "-M" option on the command line.

See the Opcode module for information about opcodes, optags, opmasks and important information about safety.

# [SEE ALSO](#SEE_ALSO)

Opcode, Safe, perlrun

2026-08-31 perl v5.44.0

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Document: ops(3pm) from perl 5.44.0-r1 (Chainguard OS)
Source: https://github.com/Perl/perl5.git